PRELIMINARY STUDY OF DIFFERENT HORMONE TREATMENTS IN THE ARTIFICIAL PROPAGATION OF PIKEPERCH (Sander luciopreca) REGARDING THE ASPECTS OF ANIMAL WELFARE

PRELIMINARY STUDY OF DIFFERENT HORMONE TREATMENTS IN THE ARTIFICIAL PROPAGATION OF PIKEPERCH (Sander luciopreca) REGARDING THE ASPECTS OF ANIMAL WELFARE

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The pikeperch (Sander lucioperca) is very important and valuable freshwater fish in Hungary.The quality of lash is very high (white, tasty and boneless) thus the gastronomically demand grows year by year.Besides the pikeperch is an attractive game fish and as a top predator, plays an important role in the maintenance precis vodka of ecological balance in freshwater ecosystems.

The success of pond culture of pikeperch depends on the propagation and nursing methods.Recently the technological development of artificial reproduction ensures the production of more fry and fingerlings.Present study investigates the different reproduction methods in consideration of the spawning behaviour of the pikeperch breeders.

Between the hormone treatment and spawning there were observed six stagers in the behaviour of pike-perch couples- In addition to the observations on behaviour of spawning, various hormone products were examined in order to stimulate and synchronise the ovulation of pike perch breeders.Best results were recorded in case of using dried carp pituitary as a hormone treatment (170g eggs/stripped females), while the treatment with GnRH analogs resulted 145 g respectively.Moreover the price and biological advances of GnRH analogs require more research in their use in the field of artificial orange peel cestrum propagation of pikeperch.

These hormones do not interfere violently the neuro-humoral regulation of the ovulation, thus contributes to maintain better conditions of animal welfare during the propagation procedure.